Flu Season Is Starting Earlier Than Usual in the U.S., CDC Data Shows

Influenza season in the United States typically begins in late October or early November and peaks between December and February. However, new data suggests that this year’s flu season may be starting earlier than usual.

According to the Centers for Disease Control and Prevention (CDC), approximately 3.4% of respiratory samples tested for influenza during the week of September 26 tested positive. That is about seven times the rate recorded during the same week in 2025.

Where flu activity is rising

The positive tests have mostly come from western states, including California, Washington and Arizona. Regardless of where you live in the United States, most people are advised to get a flu shot in September or October each year, including during this flu season.

Why getting a flu shot matters

Annual influenza vaccination is the best way to help prevent hospitalization and death from seasonal influenza. Flu vaccination is recommended for almost everyone over 6 months of age. Older adults may have special vaccine options, including high-dose vaccines and vaccines containing adjuvants, which are additional immune-stimulating components.

Have you received your flu vaccine?

With flu season starting early this year, our latest poll asks whether you plan to get vaccinated or have already received your flu shot. Share your response in the comments section below.